Drawing Leonardo Pereznieto's eye by Marcello Barenghi - super sped up

This is my drawing of the eye of the Artist Leonardo Pereznieto. Here are his youtube channels: https://www.youtube.com/FineArtEBooks (en)
https://www.youtube.com/ArteDivierte (es)
I drew his eye and Leonardo drew mine, watch his drawing here:
https://youtu.be/6isePB_nWDo (en)
https://youtu.be/-AD5eIZvBTY (es)

Music Remember this Summer by Cinquequarti: please feel free to visit http://audiojungle.net/user/Cinquequarti
http://audiojungle.net/item/re....member-this-summer/5

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FINAL PICTURE: http://www.marcellobarenghi.com/2015/05/leonardo-pereznietos-eye-drawing-by.html

DRAWING TOOLS AND ART SUPPLIES:
http://www.marcellobarenghi.com/p/materials-used-for-my-drawing-video-on.html
I also used my old airbrush for doing some shadows

THIS DRAWING TOOK ME:
4 hours and 28 minutes

Check out the full drawing process in this youtube video! A time lapse of the drawing from beginning to end.
Drawing Leonardo Pereznieto's eye, mixed media on gray paper by Marcello Barenghi - Italian Art.
Dibujo hiperrealista time-lapse: El ojo del artista Leonardo Pereznieto
Dessin hyperréaliste time-lapse: L'oeil de l'artiste Leonardo Pereznieto
Desenho hiper-realista time-lapse: O olho do artista Leonardo Pereznieto
Disegno iperrealistico in time lapse: L'occhio dell'artista Leonardo Pereznieto
Hyper-realistische Zeichnung - Zeitraffer: Das Auge des Künstlers Leonardo Pereznieto
ハイパーリアルな描画 - タイムラプス - アーティストレオナルドPereznietoの目